package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category>
        implements CategoryService {
    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    //自己拓展的方法
    @Override
    public void removeCategory(String id) {
        //在这里删除分类
        //基于分类Id,去查询菜品，是否有在使用的记录，如果有不能删除，我们需要使用自定义异常来处理
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count = dishService.count(dishLambdaQueryWrapper);
        if (count > 0) {
            throw new CustomException("菜品正在使用分类，不能被删除！！");
        }
        //基于分类Id,去查询套餐，是否有在使用的记录，如果有不能删除，我们需要使用自定义异常来处理
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int countSetmeal = setmealService.count(setmealLambdaQueryWrapper);
        if (countSetmeal > 0) {
            throw new CustomException("套餐正在使用分类，不能被删除！！");
        }
        this.removeById(id);
    }
}
